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Huang B, Lin G, Chen F, Yang W, Zhang C, Yao Y, Zeng Q, Yang Y, Huang J. UCP2 knockout exacerbates sepsis-induced intestinal injury by promoting NLRP3-mediated pyroptosis. Int Immunopharmacol 2024; 141:112935. [PMID: 39159561 DOI: 10.1016/j.intimp.2024.112935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 07/05/2024] [Accepted: 08/12/2024] [Indexed: 08/21/2024]
Abstract
Sepsis-induced intestinal injury is a common complication that increases the morbidity and mortality associated with sepsis. UCP2, a mitochondrial membrane protein, is involved in numerous cellular processes, including metabolism, inflammation, and pyroptosis. According to our previous studies, UCP2 expression increases in septic intestinal tissue. However, its function in intestinal damage is not known. This work investigated UCP2's role in intestinal injury caused by sepsis. A sepsis mouse model was established in wild-type and UCP2-knockout (UCP2-KO) animals using cecal ligation and puncture (CLP). MCC950, an NLRP3 inflammasome inhibitor, was injected intraperitoneally 3 h before CLP surgery. Overall, significantly higher levels of UCP2 were observed in the intestines of septic mice. UCP2-KO mice subjected to CLP exhibited exacerbated intestinal damage, characterized by enhanced mucosal erosion, inflammatory cell infiltration, and increased intestinal permeability. Furthermore, UCP2 knockout significantly increased oxidative stress, inflammation, and pyroptosis in the CLP mouse intestines. Interestingly, MCC950 not only inhibited pyroptosis but also reversed inflammation, oxidative stress as well as damage to intestinal tissues as a result of UCP2 knockout. Our results highlighted the protective functions of UCP2 in sepsis-associated intestinal injury through modulation of inflammation and oxidative stress via NLRP3 inflammasome-induced pyroptosis.
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Affiliation(s)
- Bolun Huang
- Department of Pediatric Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou 510623, China
| | - Gangxi Lin
- The School of Clinical Medicine, Fujian Medical University, Fuzhou 350007, China; Department of Pediatrics, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Feiyan Chen
- Department of Pediatric Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou 510623, China
| | - Wenmin Yang
- Department of Pediatric Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou 510623, China
| | - Chunmin Zhang
- Department of Pediatric Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou 510623, China
| | - Yu Yao
- Department of Otolaryngology Head & Neck Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Qiyi Zeng
- Department of Pediatrics, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Yiyu Yang
- Department of Pediatric Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou 510623, China.
| | - Jinda Huang
- Department of Pediatric Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou 510623, China.
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Laval N, Paquette M, Talsmat H, Marandyuk B, Wintermark P, Birca A, Pinchefsky EF, Tremblay S. Exposure to Maternal Diabetes during Pregnancy Is Associated with Aggravated Short-Term Neonatal and Neurological Outcomes following Perinatal Hypoxic-Ischemic Encephalopathy. Am J Perinatol 2024; 41:e1581-e1590. [PMID: 36918161 DOI: 10.1055/a-2053-7904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
OBJECTIVE Infants of diabetic mothers (IDM) are at higher risk of perinatal morbidities and glycemic instability, but the impact of maternal diabetes on neonatal and neurological short-term outcomes of neonates with hypoxic-ischemic encephalopathy (HIE) remains poorly described. Our objective was to determine the impact of maternal diabetes on neonatal and neurological short-term outcomes following neonatal HIE. STUDY DESIGN This was a retrospective single-center study including 102 term neonates with HIE who received therapeutic hypothermia (TH) treatment between 2013 and 2020. Multiple regression analysis was used to assess the relationship between the presence of maternal diabetes and short-term outcomes. RESULTS Neonates with HIE and maternal diabetes exposure had a significantly lower gestational age at birth (38.6 vs. 39.7 weeks of gestation, p = 0.005) and a significantly higher mean birth weight (3,588 ± 752 vs. 3,214 ± 514 g, p = 0.012). IDM with HIE were ventilated for longer duration (8 vs. 4 days, p = 0.0047) and had a longer neonatal intensive care unit (NICU) stay (18 vs. 11 days, p = 0.0483) as well as took longer time to reach full oral feed (15 vs. 7 days, p = 0.0432) compared with neonates of nondiabetic mother. Maternal diabetes was also associated with an increased risk of death or abnormal neurological examination at discharge in neonates with HIE (odds ratio: 6.41 [1.54-26.32]). CONCLUSION In neonates with HIE, maternal diabetes is associated with an increased risk of death or short-term neonatal morbidities, such as longer duration of ventilation, prolonged neonatal stay, greater need for tube feeding, and being discharged with an abnormal neurological examination. Strategies to prevent, reduce, or better control maternal diabetes during pregnancy should be prioritized to minimize complications after perinatal asphyxia. KEY POINTS · Maternal DB is associated with unfavorable outcomes.. · IDM have longer ventilatory support and tube feeding.. · IDM have higher risk of abnormal neurological examination..
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Affiliation(s)
- Nancy Laval
- CHU Ste-Justine Research Center, Montréal, QC, Canada
- Department of Neonatology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Mariane Paquette
- CHU Ste-Justine Research Center, Montréal, QC, Canada
- Department of Neonatology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Hamza Talsmat
- CHU Ste-Justine Research Center, Montréal, QC, Canada
| | | | - Pia Wintermark
- Department of Pediatrics, Montréal Children's Hospital, Montréal, QC, Canada
| | - Ala Birca
- CHU Ste-Justine Research Center, Montréal, QC, Canada
- Division of Neurology, Department of Neurosciences and Paediatrics, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Elana F Pinchefsky
- CHU Ste-Justine Research Center, Montréal, QC, Canada
- Division of Neurology, Department of Neurosciences and Paediatrics, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Sophie Tremblay
- CHU Ste-Justine Research Center, Montréal, QC, Canada
- Department of Neonatology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
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Duan WL, Wang XJ, Ma YP, Sheng ZM, Dong H, Zhang LY, Zhang BG, He MT. Therapeutic strategies targeting the NLRP3‑mediated inflammatory response and pyroptosis in cerebral ischemia/reperfusion injury (Review). Mol Med Rep 2024; 29:46. [PMID: 38275110 PMCID: PMC10835666 DOI: 10.3892/mmr.2024.13170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 01/12/2024] [Indexed: 01/27/2024] Open
Abstract
Ischemic stroke poses a major threat to human health. Therefore, the molecular mechanisms of cerebral ischemia/reperfusion injury (CIRI) need to be further clarified, and the associated treatment approaches require exploration. The NOD‑like receptor thermal protein domain associated protein 3 (NLRP3) inflammasome serves an important role in causing CIRI, and its activation exacerbates the underlying injury. Activation of the NLRP3 inflammasome triggers the maturation and production of the inflammatory molecules IL‑1β and IL‑18, as well as gasdermin‑D‑mediated pyroptosis and CIRI damage. Thus, the NLRP3 inflammasome may be a viable target for the treatment of CIRI. In the present review, the mechanisms of the NLRP3 inflammasome in the intense inflammatory response and pyroptosis induced by CIRI are discussed, and the therapeutic strategies that target the NLRP3‑mediated inflammatory response and pyroptosis in CIRI are summarized. At present, certain drugs have already been studied, highlighting future therapeutic perspectives.
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Affiliation(s)
- Wan-Li Duan
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Xue-Jie Wang
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Ya-Ping Ma
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Zhi-Mei Sheng
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Hao Dong
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Li-Ying Zhang
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Bao-Gang Zhang
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
- Department of Pathology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Mao-Tao He
- Department of Diagnostic Pathology, School of Basic Medical Sciences, Weifang Medical University, Weifang, Shandong 261041, P.R. China
- Department of Pathology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261041, P.R. China
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Schulz R, Schlüter KD. Importance of Mitochondria in Cardiac Pathologies: Focus on Uncoupling Proteins and Monoamine Oxidases. Int J Mol Sci 2023; 24:ijms24076459. [PMID: 37047436 PMCID: PMC10095304 DOI: 10.3390/ijms24076459] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 03/22/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
On the one hand, reactive oxygen species (ROS) are involved in the onset and progression of a wide array of diseases. On the other hand, these are a part of signaling pathways related to cell metabolism, growth and survival. While ROS are produced at various cellular sites, in cardiomyocytes the largest amount of ROS is generated by mitochondria. Apart from the electron transport chain and various other proteins, uncoupling protein (UCP) and monoamine oxidases (MAO) have been proposed to modify mitochondrial ROS formation. Here, we review the recent information on UCP and MAO in cardiac injuries induced by ischemia-reperfusion (I/R) as well as protection from I/R and heart failure secondary to I/R injury or pressure overload. The current data in the literature suggest that I/R will preferentially upregulate UCP2 in cardiac tissue but not UCP3. Studies addressing the consequences of such induction are currently inconclusive because the precise function of UCP2 in cardiac tissue is not well understood, and tissue- and species-specific aspects complicate the situation. In general, UCP2 may reduce oxidative stress by mild uncoupling and both UCP2 and UCP3 affect substrate utilization in cardiac tissue, thereby modifying post-ischemic remodeling. MAOs are important for the physiological regulation of substrate concentrations. Upon increased expression and or activity of MAOs, however, the increased production of ROS and reactive aldehydes contribute to cardiac alterations such as hypertrophy, inflammation, irreversible cardiomyocyte injury, and failure.
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Yang K, Bao T, Zeng J, Wang S, Yuan X, Xiang W, Xu H, Zeng L, Ge J. Research progress on pyroptosis-mediated immune-inflammatory response in ischemic stroke and the role of natural plant components as regulator of pyroptosis: A review. Biomed Pharmacother 2023; 157:113999. [PMID: 36455455 DOI: 10.1016/j.biopha.2022.113999] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 11/29/2022] Open
Abstract
Ischemic stroke (IS) is one of the leading causes of death and disability. Its pathogenesis is not completely clear, and inflammatory cascade is one of its main pathological processes. The current clinical practice of IS is to restore the blood supply to the ischemic area after IS as soon as possible through thrombolytic therapy to protect the vitality and function of neurons. However, blood reperfusion further accelerates ischemic damage and cause ischemia-reperfusion injury. The pathological process of cerebral ischemia-reperfusion injury involves multiple mechanisms, and the exact mechanism has not been fully elucidated. Pyroptosis, a newly discovered form of inflammatory programmed cell death, plays an important role in the initiation and progression of inflammation. It is a pro-inflammatory programmed death mediated by caspase Caspase-1/4/5/11, which can lead to cell swelling and rupture, release inflammatory factors IL-1β and IL-18, and induce an inflammatory cascade. Recent studies have shown that pyroptosis and its mediated inflammatory response are important factors in aggravating ischemic brain injury, and inhibition of pyroptosis may alleviate the ischemic brain injury. Furthermore, studies have found that natural plant components may have a regulatory effect on pyroptosis. Therefore, this review not only summarizes the molecular mechanism of pyroptosis and its role in ischemic stroke, but also the role of natural plant components as regulator of pyroptosis, in order to provide reference information on pyroptosis for the treatment of IS in the future.
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Affiliation(s)
- Kailin Yang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China.
| | - Tingting Bao
- Department of Endocrinology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jinsong Zeng
- The First Hospital of Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Shanshan Wang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Xiao Yuan
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Wang Xiang
- Department of Rheumatology, The First People's Hospital Changde City, Changde City, Hunan Province, China
| | - Hao Xu
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Liuting Zeng
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China.
| | - Jinwen Ge
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China; Hunan Academy of Chinese Medicine, Changsha, Hunan Province, China.
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6
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Li MH, Guan J, Chen Z, Mo JX, Wu KR, Hu XG, Lan T, Guo J. Fufang Zhenzhu Tiaozhi capsule ameliorates hyperuricemic nephropathy by inhibition of PI3K/AKT/NF-κB pathway. JOURNAL OF ETHNOPHARMACOLOGY 2022; 298:115644. [PMID: 35987412 DOI: 10.1016/j.jep.2022.115644] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 08/04/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Excessive serum uric acid (SUA) causes hyperuricemic nephropathy (HN), characterized by inflammatory infiltration and tubulointerstitial fibrosis. Most recently, we demonstrated that Fufang Zhenzhu Tiaozhi (FTZ) capsule attenuated diabetic nephropathy through inhibition of renal inflammation and fibrosis. However, whether FTZ ameliorates HN is still unclear. AIM OF THE STUDY To determine the protective roles and mechanism of FTZ in mouse renal injury and fibrosis under hyperuricemic condition. MATERIALS AND METHODS HN mice, induced by potassium oxonate and hypoxanthine, were administrated with 600 and 1200 mg/kg FTZ (intragastrically) daily for three weeks. SUA levels, renal functions and histological changes were analyzed. Western blotting, quantitative real-time PCR (q-PCR) and RNA sequencing were used to identify the roles and underlying mechanism of FTZ in HN mice. RESULTS We demonstrated that FTZ treatment mitigated renal injury in mice, as evidenced by the decrease in SUA, serum creatinine (SCr) and cystatin C (Cys C) levels, as well as improved renal histology. FTZ markedly attenuates inflammasome activation, collagen deposition and the imbalance of uric acid transporters. RNA-sequencing revealed a key mechanism involved in the protective effects on HN mice was related to PI3K/AKT/NF-κB pathway. Western blot also confirmed that FTZ diminished the phosphorylation of AKT and p65 in HN mice. CONCLUSIONS FTZ prevents renal injury, inflammation and fibrosis in HN mice via promoting uric acid excretion and inhibiting PI3K/AKT/NF-κB signaling pathway.
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Affiliation(s)
- Ming-Hui Li
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong TCM Key Laboratory for Metabolic Diseases, Guangzhou, 510006, China; School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
| | - Jin Guan
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong TCM Key Laboratory for Metabolic Diseases, Guangzhou, 510006, China; School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong, 510006, China.
| | - Zhe Chen
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong, 510006, China.
| | - Ju-Xian Mo
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong TCM Key Laboratory for Metabolic Diseases, Guangzhou, 510006, China.
| | - Kai-Reng Wu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong, 510006, China.
| | - Xu-Guang Hu
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
| | - Tian Lan
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong TCM Key Laboratory for Metabolic Diseases, Guangzhou, 510006, China.
| | - Jiao Guo
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong TCM Key Laboratory for Metabolic Diseases, Guangzhou, 510006, China.
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Ghafouri-Fard S, Shoorei H, Poornajaf Y, Hussen BM, Hajiesmaeili Y, Abak A, Taheri M, Eghbali A. NLRP3: Role in ischemia/reperfusion injuries. Front Immunol 2022; 13:926895. [PMID: 36238294 PMCID: PMC9552576 DOI: 10.3389/fimmu.2022.926895] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 09/01/2022] [Indexed: 12/05/2022] Open
Abstract
NLR family pyrin domain containing 3 (NLRP3) is expressed in immune cells, especially in dendritic cells and macrophages and acts as a constituent of the inflammasome. This protein acts as a pattern recognition receptor identifying pathogen-associated molecular patterns. In addition to recognition of pathogen-associated molecular patterns, it recognizes damage-associated molecular patterns. Triggering of NLRP3 inflammasome by molecules ATP released from injured cells results in the activation of the inflammatory cytokines IL-1β and IL-18. Abnormal activation of NLRP3 inflammasome has been demonstrated to stimulate inflammatory or metabolic diseases. Thus, NLRP3 is regarded as a proper target for decreasing activity of NLRP3 inflammasome. Recent studies have also shown abnormal activity of NLRP3 in ischemia/reperfusion (I/R) injuries. In the current review, we have focused on the role of this protein in I/R injuries in the gastrointestinal, neurovascular and cardiovascular systems.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Shoorei
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Anatomical Sciences, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Yadollah Poornajaf
- Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Bashdar Mahmud Hussen
- Department of Pharmacognosy, College of Pharmacy, Hawler Medical University, Erbil, Iraq
- Center of Research and Strategic Studies, Lebanese French University, Erbil, Iraq
| | | | - Atefe Abak
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taheri
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Institute of Human Genetics, Jena University Hospital, Jena, Germany
- *Correspondence: Mohammad Taheri, ; Ahmad Eghbali,
| | - Ahmad Eghbali
- Anesthesiology Research Center, Mofid Children Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- *Correspondence: Mohammad Taheri, ; Ahmad Eghbali,
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The neuroprotective mechanism of lithium after ischaemic stroke. Commun Biol 2022; 5:105. [PMID: 35115638 PMCID: PMC8814028 DOI: 10.1038/s42003-022-03051-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 01/12/2022] [Indexed: 02/07/2023] Open
Abstract
Stroke causes degeneration and death of neurones leading to the loss of motor function and frequent occurrence of cognitive impairment and depression. Lithium (Li+), the archetypal mood stabiliser, is neuroprotective in animal models of stroke, albeit underlying mechanisms remain unknown. We discover that Li+ inhibits activation of nucleotide-binding oligomerisation domain-like receptor family pyrin domain-containing 3 (NLRP3) inflammasomes in the middle cerebral artery occlusion (MCAO) stroke model in mice. This action of Li+ is mediated by two signalling pathways of AKT/GSK3β/β-catenin and AKT/FoxO3a/β-catenin which converge in suppressing the production of reactive oxygen species (ROS). Using immunocytochemstry, MRI imaging, and cell sorting with subsequent mRNA and protein quantification, we demonstrate that Li+ decreases the infarct volume, improves motor function, and alleviates associated cognitive and depressive impairments. In conclusion, this study reveals molecular mechanisms of Li+ neuroprotection during brain ischaemia, thus providing the theoretical background to extend clinical applications of Li+ for treatment of ischemic stroke.
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Dong LD, Ma YM, Xu J, Guo YZ, Yang L, Guo FY, Wang MX, Jing L, Zhang JZ. Effect of hyperglycemia on microglial polarization after cerebral ischemia-reperfusion injury in rats. Life Sci 2021; 279:119660. [PMID: 34052292 DOI: 10.1016/j.lfs.2021.119660] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 04/28/2021] [Accepted: 05/17/2021] [Indexed: 01/11/2023]
Abstract
Hyperglycemia has been shown to aggravate ischemic brain damage, in which the inflammatory reaction induced by hyperglycemia is involved in the worsening of cerebral ischemia-reperfusion injury. However, the role of microglial polarization in hyperglycemia-aggravating cerebral ischemia-reperfusion injury remains unknown. The present study investigated whether diabetic hyperglycemia inhibited or activated microglia, as well as microglial subtypes 1 and 2. Rats were used to establish the diabetic hyperglycemia and middle cerebral artery occlusion (MCAO) model. The markers CD11b, CD16, CD32, CD86, CD206, and Arg1 were used to show M1 or M2 microglia. The results revealed increased neurological deficits, infarct volume, and neural apoptosis in rats with hyperglycemia subjected to MCAO for 30 min and reperfused at 1, 3, and 7 days compared with the normoglycemic rats. Microglia and astrocyte activation and proliferation were inhibited in hyperglycemic rats. Furthermore, M1 microglia polarization was promoted, while that of M2 microglia was inhibited in hyperglycemic rats. These findings suggested that the polarization of M1 and M2 microglia is activated and inhibited, respectively, in hyperglycemic rats and may be involved in the aggravated brain damage caused by ischemia-reperfusion in diabetic hyperglycemia.
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Affiliation(s)
- Ling-di Dong
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China; Department of Dermatology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, China
| | - Yan-Mei Ma
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China
| | - Jie Xu
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China
| | - Yong-Zhen Guo
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China
| | - Lan Yang
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China
| | - Feng-Ying Guo
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China
| | - Min-Xing Wang
- School of Clinical Medical Science, Ningxia Medical University, Yinchuan, Ningxia 750004, China
| | - Li Jing
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China.
| | - Jian-Zhong Zhang
- Department of Pathology, School of Basic Medical Science, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia 750004, China.
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